| RK | LN | Name | Time | Gap | FINA | Q? |
|---|---|---|---|---|---|---|
| 1 | 4 | Tőzsér Nóra (2017)Sárvári Gyógyfürdő | 00:48.64R:0.76 | - | 215 | |
| 2 | 5 | Imre Inez (2017)BVSC-Zugló | 00:49.01 | 00:00.37 | 210 | |
| 3 | 3 | Török Dorottya (2016)BVSC-Zugló | 00:49.10 | 00:00.46 | 209 | |
| 4 | 6 | Szalay Júlia (2017)BVSC-Zugló | 00:51.86R:0.93 | 00:03.22 | 177 | |
| 5 | 2 | Rácz Maggie (2016)KSK Delfin Klub | 00:52.63 | 00:03.99 | 170 | |
| 6 | 7 | Pálffy Liza (2017)BVSC-Zugló | 00:53.15R:0.71 | 00:04.51 | 165 | |
| 7 | 0 | Roncs Viola (2016) UNI Győri Úszó Sportegy. | 00:53.42R:0.56 | 00:04.78 | 162 | |
| 8 | 1 | Szabó Emma (2016)BVSC-Zugló | 00:53.72 | 00:05.08 | 159 | |
| 9 | 9 | Tari Szonja (2017)BVSC-Zugló | 00:56.29R:0.57 | 00:07.65 | 139 | |
| 10 | 8 | Molnár Réka (2016) UNI Győri Úszó Sportegy. | 00:57.81R:0.82 | 00:09.17 | 128 |